ATE170347T1 - DISTRIBUTION CIRCUIT FOR PULSE SIGNALS - Google Patents
DISTRIBUTION CIRCUIT FOR PULSE SIGNALSInfo
- Publication number
- ATE170347T1 ATE170347T1 AT94309701T AT94309701T ATE170347T1 AT E170347 T1 ATE170347 T1 AT E170347T1 AT 94309701 T AT94309701 T AT 94309701T AT 94309701 T AT94309701 T AT 94309701T AT E170347 T1 ATE170347 T1 AT E170347T1
- Authority
- AT
- Austria
- Prior art keywords
- reflections
- branch
- junction
- branches
- compensating circuit
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 239000004020 conductor Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
Landscapes
- Dc Digital Transmission (AREA)
- Electronic Switches (AREA)
- Burglar Alarm Systems (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Radar Systems Or Details Thereof (AREA)
- Eye Examination Apparatus (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Logic Circuits (AREA)
Abstract
Packaged signal routing circuits (e.g. on printed circuit cards or boards), route pulse signals with very short rise times from a lossy driver to multiple devices. In these routing circuits, a complex network of conductors branches from a common junction adjacent the driver output into multiple (in the disclosed embodiment, three) conduction paths of unequal length. In accordance with the invention, the internal impedance of the driver is matched to the aggregate characteristic impedance of the branch paths, and a lossless compensating circuit is attached to a shortest branch path. The compensating circuit is designed to transfer signal reflections of predetermined form to the branching junction at the driver via the shortest branch. Without the compensating circuit, reflections presented to the branching junction from the shortest branch are dissimilar to reflections presented to that junction from other branch paths. Consequently, re-reflections return from the junction to the branches, causing distortions in signals sensed at the devices. However, with the compensating circuit connected in the shortest branch, reflections presented from that branch to the junction appear in a form matching reflections presented by the other branches; and the reflections from all branches then cancel at the driver junction. Consequently, signals sensed at the devices have considerably reduced distortions due to the absence of re-reflections. In a preferred embodiment, the compensating circuit consists of a printed circuit trace of predetermined length (representing a transmission line stub with predetermined phase delay characteristics) in series with a point capacitor (or several point capacitors) having predetermined capacitance (determining the shape of the compensating reflections). The compensating circuit, which extends beyond the end of the shortest branch, connects between the end of that branch and reference potential (e.g. ground). The end of the shortest branch is also attached to a device required to sense signals appearing at that point. A new method and polarized bridge device are disclosed for use in analyzing such networks in particular (and for analyzing transmission line effects in general). This method and device permit precise observation and comparison of reflections produced in branches of a network emanating from a common junction, and accurate determination of compensation suitable for modifying such reflections. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/175,327 US5544047A (en) | 1993-12-29 | 1993-12-29 | Reflective wave compensation on high speed processor cards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE170347T1 true ATE170347T1 (en) | 1998-09-15 |
Family
ID=22639857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT94309701T ATE170347T1 (en) | 1993-12-29 | 1994-12-22 | DISTRIBUTION CIRCUIT FOR PULSE SIGNALS |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US5544047A (en) |
| EP (1) | EP0665647B1 (en) |
| JP (1) | JP2845424B2 (en) |
| AT (1) | ATE170347T1 (en) |
| BR (1) | BR9405191A (en) |
| CA (1) | CA2118148C (en) |
| DE (1) | DE69412781T2 (en) |
| ES (1) | ES2120579T3 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6272646B1 (en) * | 1996-09-04 | 2001-08-07 | Cypress Semiconductor Corp. | Programmable logic device having an integrated phase lock loop |
| US6177807B1 (en) * | 1999-05-28 | 2001-01-23 | International Business Machines Corporation | High frequency valid data strobe |
| US6847267B2 (en) * | 2000-03-07 | 2005-01-25 | Board Of Regents, The University Of Texas System | Methods for transmitting a waveform having a controllable attenuation and propagation velocity |
| US7043299B2 (en) * | 2000-09-18 | 2006-05-09 | Cameron Health, Inc. | Subcutaneous implantable cardioverter-defibrillator employing a telescoping lead |
| US7065143B1 (en) * | 2001-02-26 | 2006-06-20 | Nortel Networks Limited | Method and design for increasing signal to noise ratio in xDSL modems |
| DE10111634B4 (en) * | 2001-03-10 | 2007-03-08 | Newlogic Technologies Ag | Electrical compensation circuit for signal propagation time of integrated electronic components |
| US6690224B1 (en) | 2001-06-27 | 2004-02-10 | Cypress Semiconductor Corp. | Architecture of a PLL with dynamic frequency control on a PLD |
| US6995322B2 (en) * | 2003-01-30 | 2006-02-07 | Endicott Interconnect Technologies, Inc. | High speed circuitized substrate with reduced thru-hole stub, method for fabrication and information handling system utilizing same |
| GB0312346D0 (en) * | 2003-05-30 | 2003-07-02 | Cuthbertson Brian | Improvements to the representation of the RMS values of waveforms |
| FR2860316B1 (en) * | 2003-09-26 | 2006-05-19 | Cit Alcatel | BUS TYPE CONNECTION SYSTEM, IN PARTICULAR FOR BASKET BASKET |
| JP4585340B2 (en) * | 2005-03-16 | 2010-11-24 | 株式会社東芝 | Bus structure of integrated circuit board and its standing wave suppression method |
| US7893772B1 (en) | 2007-12-03 | 2011-02-22 | Cypress Semiconductor Corporation | System and method of loading a programmable counter |
| US9274155B2 (en) | 2012-09-25 | 2016-03-01 | International Business Machines Corporation | Cancellation of secondary reverse reflections in a very-fast transmission line pulse system |
| JP2016071908A (en) * | 2014-09-29 | 2016-05-09 | Tdk株式会社 | Magnetic head, head gimbal assembly, and magnetic recording/reproducing apparatus |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3370294A (en) * | 1964-05-13 | 1968-02-20 | Leonard R. Kahn | Communications echo suppression |
| US3465106A (en) * | 1964-09-10 | 1969-09-02 | Nippon Electric Co | Echo suppressor for long-distance communication network |
| FR1435022A (en) * | 1965-02-17 | 1966-04-15 | Thomson Houston Comp Francaise | Improvements to telecommunications systems |
| US3419682A (en) * | 1966-01-17 | 1968-12-31 | Northern Electric Co | Long transit time transmission system |
| US3723883A (en) * | 1972-02-23 | 1973-03-27 | D Renner | Automatic noise nulling circuit |
| US4081767A (en) * | 1975-12-08 | 1978-03-28 | Voss William B | Double-stub transmission line elements in communication networks |
| US4081768A (en) * | 1975-12-09 | 1978-03-28 | Voss William B | Single-stub transmission line elements in communication networks |
| US4300092A (en) * | 1980-03-24 | 1981-11-10 | Sperry Corporation | Phase match measuring system |
| US4375622A (en) * | 1981-04-20 | 1983-03-01 | Motorola, Inc. | Multiport radio frequency signal combiner |
| US4493092A (en) * | 1982-12-17 | 1985-01-08 | Gte Automatic Electric, Inc. | Interface circuit for digital signal transmission system |
| US4507793A (en) * | 1982-12-17 | 1985-03-26 | Gte Automatic Electric Incorporated | Digital signal transmission system |
| IT1178913B (en) * | 1984-03-26 | 1987-09-16 | Cselt Centro Studi Lab Telecom | ZIONAL TWO-WIRE TRANSMISSION SYSTEM WITH D ECHO CANCELLATION |
| US4645883A (en) * | 1984-05-09 | 1987-02-24 | Communications Satellite Corporation | Double talk and line noise detector for a echo canceller |
| SE447777B (en) * | 1985-04-22 | 1986-12-08 | Ellemtel Utvecklings Ab | PROCEDURE FOR SETTING A DIGITAL EQUIPMENT FILTER AT THE SAME TIME OF ADAPTIVE ECO-ELIMINATION AND ADAPTIVE ELIMINATION OF INTERFACES INCURRED BY INTERSYMBOL INTERFERENCE, AND PROCEDURE FOR IMPLEMENTATION OF PROCEDURE |
| US4866768A (en) * | 1985-06-26 | 1989-09-12 | Siemens Corporate Research & Support, Inc. | Station line interface circuit for a telecommunication network |
| SU1497723A1 (en) * | 1987-07-20 | 1989-07-30 | Предприятие П/Я А-1067 | Square pulse shaper |
| US4998079A (en) * | 1990-01-16 | 1991-03-05 | Plessey Electronic Systems Corp. | Bi-directional signal coupler for a balanced data transmission line |
| US5175515A (en) * | 1991-06-21 | 1992-12-29 | Compaq Computer Corporation | Signal routing technique for electronic systems |
| US5304856A (en) * | 1992-12-17 | 1994-04-19 | At&T Bell Laboratories | Article comprising a balanced driver circuit with less power dissipation than conventional circuit |
-
1993
- 1993-12-29 US US08/175,327 patent/US5544047A/en not_active Expired - Fee Related
-
1994
- 1994-10-14 CA CA002118148A patent/CA2118148C/en not_active Expired - Fee Related
- 1994-11-30 JP JP6296489A patent/JP2845424B2/en not_active Expired - Lifetime
- 1994-12-21 BR BR9405191A patent/BR9405191A/en not_active IP Right Cessation
- 1994-12-22 ES ES94309701T patent/ES2120579T3/en not_active Expired - Lifetime
- 1994-12-22 AT AT94309701T patent/ATE170347T1/en not_active IP Right Cessation
- 1994-12-22 EP EP94309701A patent/EP0665647B1/en not_active Expired - Lifetime
- 1994-12-22 DE DE69412781T patent/DE69412781T2/en not_active Expired - Fee Related
-
1996
- 1996-08-05 US US08/689,186 patent/US5638287A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2118148A1 (en) | 1995-06-30 |
| ES2120579T3 (en) | 1998-11-01 |
| US5638287A (en) | 1997-06-10 |
| JPH07212406A (en) | 1995-08-11 |
| DE69412781T2 (en) | 1999-04-15 |
| CA2118148C (en) | 1998-06-16 |
| US5544047A (en) | 1996-08-06 |
| JP2845424B2 (en) | 1999-01-13 |
| BR9405191A (en) | 1995-08-08 |
| EP0665647B1 (en) | 1998-08-26 |
| DE69412781D1 (en) | 1998-10-01 |
| EP0665647A1 (en) | 1995-08-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| UEP | Publication of translation of european patent specification | ||
| REN | Ceased due to non-payment of the annual fee |